ClusterManagerTaskThrottler Improvements

[sumitasr]

Description

ClusterManagerTaskThrottler Improvements

• Add shallow check in ClusterManagerTaskThrottler's onBeginSubmit method before computeIfPresent to avoid lock when queue is full

• Remove stack trace filling in ClusterManagerThrottlingException

• Update log level from WARN to trace for performance improvements.

• Added unit test to verify throttling during shallow check when lock is acquired on task count map by different thread.

Related Issues

#13741

Testing

• Not seeing BLOCKED threads after the code changes deployed to cluster manager nodes in the thread dumps.
• ClusterManagerThrottlingException is not filling up stack traces.
• Added unit tests

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

❌ Gradle check result for 767f990: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for b627fac: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for 2ada278: SUCCESS

[github-actions]

❕ Gradle check result for 27b68c5: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.90%. Comparing base (0753461) to head (7b98efe).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #15508      +/-   ##
============================================
+ Coverage     71.85%   71.90%   +0.04%     
- Complexity    64054    64090      +36     
============================================
  Files          5269     5269              
  Lines        299679   299687       +8     
  Branches      43311    43310       -1     
============================================
+ Hits         215343   215480     +137     
+ Misses        66693    66480     -213     
- Partials      17643    17727      +84     

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[github-actions]

❌ Gradle check result for 1ca0ac0: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-15508-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 17b5f98c5e28c5b56fe88d39513c4ce119600b9c
# Push it to GitHub
git push --set-upstream origin backport/backport-15508-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-15508-to-2.x.

[sumitasr]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-15508-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 17b5f98c5e28c5b56fe88d39513c4ce119600b9c
# Push it to GitHub
git push --set-upstream origin backport/backport-15508-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-15508-to-2.x.

Raised backport - #15647